Buck converter not down-regulating

[Adam May 28, 2018 at 2:30 pm Post count: 0]

#29803 Reply |

Hi– My DROK Buck Converter, DC 10-75V to DC 0-60V 12A 720W Step Down Transformer all of a sudden is just…not stepping the input voltage DOWN, no matter how I change the settings.  Input voltage is 48vdc, output voltage is 48vdc.  Fuse is fine, and I see no indication of burned components.  Can you suggest ANY troubleshooting I can to that would help me find the cause?  The GOOD NEWS is that I have another IDENTICAL converter that IS working, so I could use it for troubleshooting.  Thank you for ANY suggestions!  –Adam

[DrokKeymaster May 29, 2018 at 8:16 am Post count: 2971]

#29806 Reply |

Hello Adam，
Please kindly confirm if it is this item. 200310
Could you please tell us more details about operation? When you press up or down button, can you change the voltage value? Or does it just show 48V no mater how did you press button?  Did you lock the button by mistake?
It will be more helpful if you can take a short video or some images. Then we can check problem more carefully. You can share us YouTube video or send it directly to our service email(service@droking.com)
Best regards.

[Adam May 30, 2018 at 3:00 am Post count: 0]

#29810 Reply |

Hello–Yes, it is the 200310.  I can change the desired volts and amps settings on the display (far left button, then the up and down buttons), but when I press the output button (far right button) the value always shows the input voltage, which is 48 volts dc.  I’m not able to take a video.  Do you have any troubleshooting suggestions? I have a working 200310 that I can compare it to, to identify a failed component if you think that’s what it might be.  Thanks you for any help.–Adam

[DrokKeymaster May 31, 2018 at 6:38 am Post count: 2971]

#29817 Reply |

Hello Adam,

Our technicians think it may be caused by the mosfet 045N10. Can you check if  it burn out?

Best regards.

[Adam May 31, 2018 at 4:52 pm Post count: 0]

#29820 Reply |

Thank you. I will check. Just to confirm I am looking at the correct one…

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#129166 Reply |

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